STRAIN-SPECIFIC SALT TOLERANCE AND CHEMOTAXIS OF AZOSPIRILLUM-BRASILENSE AND THEIR ASSOCIATIVE N-FIXATION WITH FINGER MILLET IN SALINE CALCAREOUS SOIL

被引：13

作者：

RAI, R

机构：

[1] Department of Microbiology, N.D. University of Agriculture and Technology, Kumarganj, 224 229, (Faizabad) U. P.

来源：

PLANT AND SOIL | 1991年 / 137卷 / 01期

关键词：

AZOSPIRILLUM-BRASILENSE; CHEMOTAXIS; ELEUSINE-CORACANA; NITROGENASE ACTIVITY; ROOT EXUDATES; SALT TOLERANT;

D O I：

10.1007/BF02187432

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Three salt-tolerant Azospirillum brasilense strains were isolated from the roots of finger millet grown in saline calcareous soil and characterized. The effect of various salts on growth and N2ase activity of these strains was tested and strain STR1 was found more tolerant at higher concentrations of Cl-, SO4(2-) and HCO3-. Bicarbonate was found to be the most toxic. The content and concentrations of root exudates of finger millet genotypes were different and chemotaxis to sugars, amino acids, organic acids and root exudates was strain specific. Under salt stress, significant interactions between strains and genotypes of finger millet resulted in different responses of N2ase activity, endo- and exorhizospheric population, dry weight of root, shoot and grain yield.

引用

页码：55 / 59

页数：5